Halogenated butyl rubber graft copolymers

Details Halogenated butyl rubber graft copolymers Halogenated butyl rubber graft copolymers

C - Chemistry, Metallurgy

08

F

C08F 299/00 (2006.01) C08G 81/02 (2006.01) C08L 51/04 (2006.01)

Patent

CA 2067561

A process for grafting halogenated butyl rubbers with polymers based on conjugated diolefin monomers is provided which comprises mixing a first solution of halogenated butyl rubber with a second solution of a living alkali metal terminated polymer based on conjugated diolefin monomers and having a number average molecular weight of at least 40,000 at a temperature of from about -10°C to about 80°C for a period of time of from about 30 minutes to about 24 hours whereby the graft copolymer is formed. Rubber compositions comprising the halogenated butyl rubber graft copolymers upon vulcanization exhibit improved abrasion resistance and wet skid resistance while a desirable balance of other physical properties is maintained.

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